package com.imooc.dom4j;

import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

public class XPathTestor {
	public void xpath(String xpathExp) {
		String file="e:/java/eclipse-workspace/xml/src/hr-schema.xml";
		SAXReader reader=new SAXReader();
		try {
			Document document=reader.read(file);
			List<Node> nodes=document.selectNodes(xpathExp);
			for(Node node:nodes) {
				Element emp=(Element)node;
				System.out.println(emp.attributeValue("no"));
				System.out.println(emp.elementText("name"));
				System.out.println(emp.elementText("age"));
				System.out.println(emp.elementText("salary"));
				System.out.println("============================");
			}
		} catch (DocumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		XPathTestor xpt=new XPathTestor();
//		xpt.xpath("/hr/employee");
//		xpt.xpath("//employee");
//		xpt.xpath("//employee[salary<5000]");
//		xpt.xpath("//employee[name='李铁柱']");
//		xpt.xpath("//employee[@no=6302]");
//		xpt.xpath("//employee[1]");
//		xpt.xpath("//employee[last()]");
//		xpt.xpath("//employee[position()<3]");
		xpt.xpath("//employee[1]|//employee[3]");
		
	}

}

<?xml version="1.0" encoding="UTF-8"?>
<!-- 人力资源管理系统 -->
<hr xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:noNamespaceSchemaLocation="hr.xsd">
	<employee no="3310">
		<name>张三</name>
		<age>31</age>
		<salary>4000</salary>
		<departement>
			<dname>会计部</dname>
			<address>XX大厦-B803</address>
		</departement>
	</employee>
	<employee no="4502">
		<name>李四</name>
		<age>23</age>
		<salary>8000</salary>
		<departement>
			<dname>开发部</dname>
			<address>XX大厦-A910</address>
		</departement>
	</employee>
	<employee no="6302">
		<name>李铁柱</name>
		<age>32</age>
		<salary>9000</salary>
		<departement>
			<dname>销售部</dname>
			<address>XX大厦-A203</address>
		</departement>
	</employee>
</hr>

List<Node> nodes=document.selectNodes(xpathExp);这句程序取到的是根节点下的第一个节点吗？